D....the empty weight is 160gr
        
                    
             
        
        
        
The answer to this question of yours is B
        
             
        
        
        
Answer:After choosing the color she still has the choices of brands and style so:
Tahari has 4*3=12 options left.
Step-by-step explanation:
 
        
                    
             
        
        
        
(-4) is the same as x, so looking the conditions that are the results for the function, you realize:
-2 is the result of the function to the values of X that are under -3: the result will be -2 if x < -3
x < -3 ; x = -4 ; -4 < -3 (it's true), in other words, -4 is less than -3, so f(-4) = -2
        
             
        
        
        
a)  has CDF
 has CDF


where the last equality follows from independence of  . In terms of the distribution and density functions of
. In terms of the distribution and density functions of  , this is
, this is

Then the density is obtained by differentiating with respect to  ,
,

b)  can be computed in the same way; it has CDF
 can be computed in the same way; it has CDF


Differentiating gives the associated PDF,

Assuming  and
 and  , we have
, we have


and


I wouldn't worry about evaluating this integral any further unless you know about the Bessel functions.